https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115227
Bug ID: 115227
Summary: [15 Regression] i686-linux fails frequently with cc1:
out of memory allocating x bytes after a total of ~4GB
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at gcc dot gnu.org
Target Milestone: ---
Created attachment 58286
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58286&action=edit
bug.c.c.xz
Initially noticed on libepoxy, doxygen, llvm, p11-kit. They all fail to build
by 32-bit gcc-15. The symptoms are similar: 4GB limit is hit and `gcc` fails on
allocation.
Attached preprocessed and compressed example of libepoxy:
$ gcc-15 -std=gnu99 -fno-strict-aliasing -fvisibility=hidden -c bug.c.c -o
bug.o -O2
cc1: out of memory allocating 65536 bytes after a total of 3774660608 bytes
For comparison gcc-13 is able to survive:
$ gcc-13 -std=gnu99 -fno-strict-aliasing -fvisibility=hidden -c bug.c.c -o
bug.o -O2
<ok>
$ gcc-15 -v
Using built-in specs.
COLLECT_GCC=/<<NIX>>/gcc-15.0.0/bin/gcc
COLLECT_LTO_WRAPPER=/<<NIX>>/gcc-15.0.0/libexec/gcc/i686-unknown-linux-gnu/15.0.0/lto-wrapper
Target: i686-unknown-linux-gnu
Configured with: ../source/configure --prefix=/<<NIX>>/gcc-15.0.0
--with-gmp-include=/<<NIX>>/gmp-6.3.0-dev/include
--with-gmp-lib=/<<NIX>>/gmp-6.3.0/lib
--with-mpfr-include=/<<NIX>>/mpfr-4.2.1-dev/include
--with-mpfr-lib=/<<NIX>>/mpfr-4.2.1/lib --with-mpc=/<<NIX>>/libmpc-1.3.1
--with-native-system-header-dir=/<<NIX>>/glibc-2.39-52-dev/include
--with-build-sysroot=/
--with-gxx-include-dir=/<<NIX>>/gcc-15.0.0/include/c++/15.0.0/
--program-prefix= --enable-lto --disable-libstdcxx-pch
--without-included-gettext --with-system-zlib --enable-checking=release
--enable-static --enable-languages=c,c++ --disable-multilib --enable-plugin
--disable-libcc1 --with-isl=/<<NIX>>/isl-0.20 --disable-bootstrap
--with-arch=i686 --build=i686-unknown-linux-gnu --host=i686-unknown-linux-gnu
--target=i686-unknown-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 99999999 (experimental) (GCC)
